检索范围:
排序: 展示方式:
Dynamic modeling and coupling characteristics of rotating inclined beams with twisted-shape sections
Jin ZENG, Chenguang ZHAO, Hui MA, Bangchun WEN
《机械工程前沿(英文)》 2020年 第15卷 第3期 页码 374-389 doi: 10.1007/s11465-019-0580-8
关键词: elastic-support boundary pre-twisted beam semi-analytic method modal strain energy ratio torsional vibration
《结构与土木工程前沿(英文)》 2021年 第15卷 第6期 页码 1453-1479 doi: 10.1007/s11709-021-0767-z
关键词: damage detection deep feed-forward neural networks functionally graded carbon nanotube-reinforced composite plates modal kinetic energy
Hamed FATHNEJAT, Behrouz AHMADI-NEDUSHAN
《结构与土木工程前沿(英文)》 2020年 第14卷 第4期 页码 907-929 doi: 10.1007/s11709-020-0628-1
关键词: two-stage method modal strain energy surrogate model GMDH optimization damage detection
Alireza ARABHA NAJAFABADI, Farhad DANESHJOO, Hamid Reza AHMADI
《结构与土木工程前沿(英文)》 2020年 第14卷 第3期 页码 722-730 doi: 10.1007/s11709-020-0624-5
关键词: damage detection strain energy influence line complex bridges rotation displacement
Damage detection in beam-like structures using static shear energy redistribution
《结构与土木工程前沿(英文)》 2022年 第16卷 第12期 页码 1552-1564 doi: 10.1007/s11709-022-0903-4
关键词: damage detection beam structure strain energy static displacement variation energy damage index
Pengxing YI,Peng HUANG,Tielin SHI
《机械工程前沿(英文)》 2016年 第11卷 第4期 页码 388-402 doi: 10.1007/s11465-016-0404-z
Wind turbine gearbox (WTG), which functions as an accelerator, ensures the performance and service life of wind turbine systems. This paper examines the distinctive modal properties of WTGs through finite element (FE) and experimental modal analyses. The study is performed in two parts. First, a whole system model is developed to investigate the first 10 modal frequencies and mode shapes of WTG using flexible multi-body modeling techniques. Given the complex structure and operating conditions of WTG, this study applies spring elements to the model and quantifies how the bearings and gear pair interactions affect the dynamic characteristics of WTGs. Second, the FE modal results are validated through experimental modal analyses of a 1.5 WM WTG using the frequency response function method of single point excitation and multi-point response. The natural frequencies from the FE and experimental modal analyses show favorable agreement and reveal that the characteristic frequency of the studied gearbox avoids its eigen-frequency very well.
关键词: wind turbine gearbox modal analysis finite element analysis modal frequency bearing equivalence
Experimental and computational validation of a scaled train tunnel model using modal analysis
Janice B. D’SOUZA, Sangarapillai KANAPATHIPILLAI
《机械工程前沿(英文)》 2013年 第8卷 第4期 页码 420-428 doi: 10.1007/s11465-013-0281-7
Acoustic engineers are faced with the challenge of minimising reverberation time in their designs so as to contribute to the health and well-being of those traveling by train and those on the platforms. Although the problem is easy to identify, it is not as simple to solve. The acoustical environment of a train tunnel is complex, with a variety of noise contributing factors such as train announcements, speech of commuters, ventilation systems, electrical equipment and wheel and rail noise. As a result, there is some difficulty in modeling the complete acoustic environment with computational or acoustic first principles. In this study, an experimental rig was constructed to model the acoustic behavior within a tunnel. The modal properties for the 300 Hz to 1500 Hz range, including resonances and mode shapes were identified and were shown to successfully correspond to theoretical results and a computational model created in COMSOL using Finite Element Analysis.
关键词: reverberation time acoustic environment modal properties resonances
Variational mode decomposition based modal parameter identification in civil engineering
Mingjie ZHANG, Fuyou XU
《结构与土木工程前沿(英文)》 2019年 第13卷 第5期 页码 1082-1094 doi: 10.1007/s11709-019-0537-3
关键词: modal parameter identification variational mode decomposition civil structure nonlinear system closely spaced modes
Zhigen WU, Guohua LIU, Zihua ZHANG
《结构与土木工程前沿(英文)》 2011年 第5卷 第1期 页码 112-120 doi: 10.1007/s11709-010-0069-3
关键词: damage assessment decay ratio of acceleration signals (DRAS) wavelet transform (WT) modal analysis reinforced concrete beam beat phenomenon
Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 181-186 doi: 10.1007/s11465-013-0257-7
This paper demonstrates the application of a new multiaxial creep damage model developed by authors using stress traixiality to predict the failure time of a component made of 0.5%Cr-0.5%Mo-0.25%V low alloy steel. The model employs strain energy density and assumes that the uniaxial strain energy density of a component can be easily calculated and can be converted to multi-axial strain energy density by multiplying it to a function of stress trixiality which is a ratio of mean stress to equivalent stress. For comparison, an elastic-creep and elastic-plastic-creep finite element analysis (FEA) is performed to get multi-axial strain energy density of the component which is compared with the calculated strain energy density for both cases. The verification and application of the model are demonstrated by applying it to thin tube for which the experimental data are available. The predicted failure times by the model are compared with the experimental results. The results show that the proposed model is capable of predicting failure times of the component made of the above-mentioned material with an accuracy of 4.0%.
关键词: elastic-creep elastic-plastic-creep stress triaxiality life prediction pressure vessels finite element analysis (FEA)
Control mode selection for modal control of long-span arch bridge
Zhengying LI, Zhengliang LI,
《结构与土木工程前沿(英文)》 2009年 第3卷 第4期 页码 401-406 doi: 10.1007/s11709-009-0052-z
关键词: selection reduced-order excitation long-span simplified
Experimental study of modal parameter identification in a simulated ambient-excited structure
JI Xiaodong, QIAN Jiaru, XU Longhe
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 281-285 doi: 10.1007/s11709-007-0036-9
关键词: eigensystem realization eigen-sensitivity analysis realization algorithm vibration effective
Concepts and implementation of strain-based criteria in design codes for steel structures
Reidar BJORHOVDE
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 210-216 doi: 10.1007/s11709-012-0165-7
关键词: steel stress-strain characteristics tension test strain design actual behavior improved design codes
A method of analysis for modal aero-damping of vibrating blade in incompressible flow
Jun XING, Lin LI,
《能源前沿(英文)》 2009年 第3卷 第4期 页码 465-471 doi: 10.1007/s11708-009-0037-6
关键词: compressor different three-dimension analytical classical low-speed
Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0731-1
关键词: aero-engine blade displacement response dynamic strain reconstruction mode shape strain gauge
标题 作者 时间 类型 操作
Dynamic modeling and coupling characteristics of rotating inclined beams with twisted-shape sections
Jin ZENG, Chenguang ZHAO, Hui MA, Bangchun WEN
期刊论文
network for damage detection in functionally graded carbon nanotube-reinforced composite plates using modalkinetic energy
期刊论文
An efficient two-stage approach for structural damage detection using meta-heuristic algorithms and group method of data handling surrogate model
Hamed FATHNEJAT, Behrouz AHMADI-NEDUSHAN
期刊论文
Multiple damage detection in complex bridges based on strain energy extracted from single point measurement
Alireza ARABHA NAJAFABADI, Farhad DANESHJOO, Hamid Reza AHMADI
期刊论文
Numerical analysis and experimental investigation of modal properties for the gearbox in wind turbine
Pengxing YI,Peng HUANG,Tielin SHI
期刊论文
Experimental and computational validation of a scaled train tunnel model using modal analysis
Janice B. D’SOUZA, Sangarapillai KANAPATHIPILLAI
期刊论文
Variational mode decomposition based modal parameter identification in civil engineering
Mingjie ZHANG, Fuyou XU
期刊论文
Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration
Zhigen WU, Guohua LIU, Zihua ZHANG
期刊论文
A model for creep life prediction of thin tube using strain energy density as a function of stress triaxiality
Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY
期刊论文
Experimental study of modal parameter identification in a simulated ambient-excited structure
JI Xiaodong, QIAN Jiaru, XU Longhe
期刊论文
Concepts and implementation of strain-based criteria in design codes for steel structures
Reidar BJORHOVDE
期刊论文
A method of analysis for modal aero-damping of vibrating blade in incompressible flow
Jun XING, Lin LI,
期刊论文